Year Dollars 1992-01-01 806531 2006-01-01 409024 2007-01-01 3015408 2008-01-01 10392154 2009-01-01 8866611 2010-01-01 20614396 2011-01-01 18207773 2013-01-01 7046394 2014-01-01 6259762 2015-01-01 4916198 2016-01-01 6149832